package com.thinkPro.train.action.login;

import java.security.MessageDigest;

public class MD5Tool {

	public final static String MD5(String s) {      
		  char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',  'a', 'b', 'c', 'd', 'e', 'f' };      
		  try {      
		   byte[] strTemp = s.getBytes();      
		   MessageDigest mdTemp = MessageDigest.getInstance("MD5");      
		   mdTemp.update(strTemp);      
		   byte[] md = mdTemp.digest();      
		   int j = md.length;      
		   char str[] = new char[j * 2];      
		   int k = 0;      
		   for (int i = 0; i < j; i++) {      
		    byte byte0 = md[i];      
		    str[k++] = hexDigits[byte0 >>> 4 & 0xf];      
		    str[k++] = hexDigits[byte0 & 0xf];      
		   }      
		   return new String(str);      
		  } catch (Exception e) {      
		   return null;      
		   }
	}
}
